English

Observational Constraints of Modified Chaplygin Gas in Loop Quantum Cosmology

General Physics 2015-06-05 v2 Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology

Abstract

We have considered the FRW universe in loop quantum cosmology (LQC) model filled with the dark matter (perfect fluid with negligible pressure) and the modified Chaplygin gas (MCG) type dark energy. We present the Hubble parameter in terms of the observable parameters Ωm0\Omega_{m0}, Ωx0\Omega_{x0} and H0H_{0} with the redshift zz and the other parameters like AA, BB, CC and α\alpha. From Stern data set (12 points), we have obtained the bounds of the arbitrary parameters by minimizing the χ2\chi^{2} test. The best-fit values of the parameters are obtained by 66%, 90% and 99% confidence levels. Next due to joint analysis with BAO and CMB observations, we have also obtained the bounds of the parameters (B,CB,C) by fixing some other parameters α\alpha and AA. From the best fit of distance modulus μ(z)\mu(z) for our theoretical MCG model in LQC, we concluded that our model is in agreement with the union2 sample data.

Keywords

Cite

@article{arxiv.1206.0507,
  title  = {Observational Constraints of Modified Chaplygin Gas in Loop Quantum Cosmology},
  author = {Shuvendu Chakraborty and Ujjal Debnath and Chayan Ranjit},
  journal= {arXiv preprint arXiv:1206.0507},
  year   = {2015}
}

Comments

14 pages, 10 figures, Accepted in EPJC. arXiv admin note: text overlap with arXiv:astro-ph/0311622 by other authors